More Information for PERFECTION CLUTCH MU18621
{Alternate Inventory Numbers: MU1862-1, MU18621:8, 90108}
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PERFECTION CLUTCH MU18621 Specifications
Clutch Disc Diameter12.000"
ContentsCover, Disc, Release Bearing, Pilot Bearing/Bushing, Alignment Tool, Spline Lubricant
Disc MaterialOrganic
Disc Type Sprung SolidSprung
Input Shaft Diameter1.125"
Input Spline Quantity10
Pressure Plate Type3 Lever Borg and Beck
Perfection Clutch provides clutch kits that not only meet the OE performance criteria, but often include additional features to make installation easier and improve durability. All clutch kit components are tested after final assembly to ensure they meet all OE standards of fit, form and function.

Each Clutch Kit includes the following:
  • O.E.M. style cover assembly, computer tested for clamp load, plate lift, and finger height
  • O.E.M. style clutch disc with non-asbestos facings built to exceed O.E.M. specifications
  • Clutch release bearing meeting or exceeding O.E.M. specifications (unless otherwise noted in description)
  • Pilot bearing/bushing (where used)
  • Alignment tool for the perfect clutch installation (where used)
  • Hydraulic Line Disconnect Tool (where used)

Organic vs. Kevlar vs. Ceramic Friction Disc - What Is The Difference?

The Friction Disc is a vital part of any clutch. It connects the pressure plate and flywheel, and is responsible for transferring engine power to the rest of the vehicle. Clutch Kits come with several different types of friction discs, and it is important to understand the pros and cons of each material:

Clutch Disc Material Smooth Engagement Holding Power
(Friction "Grab")
High Torque Capacity Lifespan Gentle To Flywheel
★★★ ★★ ★★★
★★★ ★★ ★★ ★★★ ★★★
Ceramic / Cerametallic
★★★ ★★★

Tips & Tools For The Job
  • Wear a Dust Mask to protect against hazardous clutch dust. You can also spray the clutch with water prior to removal to reduce the amount of airborne dust during disassembly.
  • Use a Flywheel Turner to hold the flywheel in place while removing and reinstalling the pressure plate bolts.
  • Apply Blue Threadlocker to flywheel bolts prior to installation to prevent backing out due to the high vibrations flywheels are subject to.
  • Use the provided lubricant to lightly lubricate the splines of the input shaft. Over lubricating the input shaft risks lubricant transfer to the clutch friction disc and can cause clutch slippage.
  • Be sure to install the new clutch friction disc in the correct direction. The disc will have a "Flywheel Side" label on one side.


Clutch Quick Start Installation Guide

General Motors RWD Clutch Fork and Release Bearing Installation Part 2: The Solution

Additional Resources

Clutch Cover Bolt and Lockwasher
Release Bearing Installation
Freeplay Adjustment
Flywheel Side Identification
Installation Instructions

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

PERFECTION CLUTCH Regular Inventory Warranty Information:
12 Months